Tell that to the numerous people who have died when trying to get out of places such as a night club when a stampede comes up against an inward opening door...Oh Ellal, that's hilarious!
Still find it hilarious?
Plus you could also think about the fact that outward opening doors are better at keeping out the weather, especially heavy rain as the lip is over the threshold...
Ask yourself (as mottie has said), why most sheds (of whatever sex they may be) have outward opening doors.